Using numbers, mixed-case letters and minimum length in your password increases the difficulty of guessing or cracking your password. For example, there are more than 6 quadrillion possible variations for an eight-character password with numbers and mixed-case letters — 30,000 times more variations than an eight-character password with only lowercase letters.

Choose a combination of letters and numbers to create a unique password that's unrelated to your personal information. Or, select a random word or phrase, and insert letters and numbers into the beginning, middle, and end to make it extra difficult to guess (such as "sPo0kyh@ll0w3En"). You won't be able to use simple words or phrases like "password" or "letmein," keyboard patterns such as "qwerty" or "qazwsx," or sequential patterns such as "abcd1234" as Momentum passwords any more - they're just too easy to guess.